Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fd1685da46d5163…

MALICIOUS

PDF

357.2 KB Created: 2015-08-29 01:49:49 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 50648350ac95eb0e034eb38c124c15e9 SHA-1: cfb076ffd7e834571244394ef750f8431045c61d SHA-256: 8fd1685da46d516346cd0cc2dc6fe8852d6310eb88a325f506843cd4aaf50f15
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, botcraftman.ru, which is indicative of a delivery mechanism for further malicious content. The ClamAV detection 'Pdf.Dropper.Agent-8935497-0' further supports this, suggesting the PDF acts as a dropper. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • ClamAV: Pdf.Dropper.Agent-8935497-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8935497-0
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://botcraftman.ru/?lip&keyword=birdy+shelter+%D0%BD%D0%BE%D1%82%D1%8B+%D0%B4%D0%BB%D1%8F+%D1%84%D0%BE%D1%80%D1%82%D0%B5%D0%BF%D0%B8%D0%B0%D0%BD%D0%BE&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4818/4818293_koran__transkripciya__na_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4818/4818009_zhizn__i__priklyucheniya_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4817/4817830_razrabotki__urokov__po_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005490b.bin
5eddfd27ed36fb3d3659fa2589f8edf530d8c7b2202b25d94fc5068ec29b6f63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5490B 9496 bytes
font_01_sfnt_off000563cc.bin
0f11e620375ad1e61a1785285c290dc85e46eb256805bc18d5dd0a5ebae0bdf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x563CC 15896 bytes

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